My only question is why anyone would waste all that delicious bacon fat on a candle? Fried eggs, home fries, corn bread, biscuit, mmm, lots of good stuff to make with that. There isn't a food that exists that isn't better without bacon fat. Even brownies.

you can use almost any type of fat or grease as a "candle" or lamp. i've been doing it for years (vegetable oil works too). get a ceramic container and fill it with your fat of choice, cut a slit in cork and insert a woven cotton wick into it (and long enough to dip down into oil/fat). light wick and enjoy.

"fat lamps" have existed for thousands of years, and i'm not sure why anyone is questioning it.